US · guidance
CMS Pub. 100-04, ch. 2, § 01
Purpose of Chapter
This chapter describes general requirements with respect to verifying an individual’s
Medicare eligibility and entitlement status for providers, suppliers, A/B MACs (A), (B),
and (HHH), and DME MACs. It also includes general requirements for hospitals for
determining the source admission for use later in the claims process.
History
(Rev. 3441, Issued: 01-15-16, Effective; 12-31-13; ASC X12: 01-01-12, MAC Implementation: 02-16-16; ASC X12: 02-16-16)
Provenance
- Source
- cms.gov
- Retrieved
- 2026-08-25
- Edition
- iom-2026-08-25
- Content hash
db6af6cc79a30b4a2cd9b763522587639aae8aa2fdd2250bfb46e7ea4f5b8f1d
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